Safety-lamp.



No. 879,934. PATENTED FEB. 25, 1908. y A. G. R. WILLIAMS.

SAFETY LAMP.

APPLICATION FILED AUG. 6,1906.

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UNITED sra ATEN FFICE.

SAFETY-LAMP.

Specification of Letters Patent.

Patented Feb. 25, 1908.

Application filed August 6. 1906. Serial No. 329.366.

To all whom it may concern:

Be it known that I, ARTHUR GEORGE RICH WILLIAMS, a subject of His Majesty-the King of Great Britain and Ireland, residing at Petone,Wellington, in the Provincial District of Wellington, in the Colony ofNew Zealand, have invented certain new and useful Improvements inSafety-Lamps, of which the followingis a specification.

This invention relates to apparatus designed to prevent explosion andflre being caused through the overturning of a lamp in which kerosene orthe like oil is used as the illuminant.

According to my invention the flame of the lamp is extinguishedimmediately the lamp is tilted beyond a predetermined angle.

I adapt to the wick tube of the lamp a sliding shield which, when thesaid shield is at the top of the wick tube, extinguishes the flame ofthe wick. The shield is operated by a lever, which is hinged at one endupon the lamp frame, and actuated by a spring which tends to raise itand the shield.

A balance weight in the form of a ball is carried in a shallow cup atthe end of the lever, and has weight sufficient to counteract the upwardpressure of the spring. The tilting of the lamp causes the ball to fallfrom the cup whereby the lever is free to rise, carrying with it theshield which extinguishes the flame.

My invention is illustrated on the accompanying drawing.

Figure 1 is a side elevation partly in section showing circular wickwith the invention applied thereto. Fig. 2 is a perspective elevation ofa circular shield, and Fig. 3 is a perspective view of a lever.

The shield 1 is made cylindrical and adapted to flt upon the wick tube2. A pin 3 proj ecting from the shield 1 engages a hole 4 provided in akink 5 of a lever 6, which is pivoted to the lamp frame 7 by a pin 8 andpassing around the outside of the shield 1 is pro vided at its outer endwith a cup 9, which is adjustable upon the lever by a screw 10 andadapted to hold a ball 11. A coil spring 12 has one end bearing upon theframe 7 of the lamp, and has its other end extended to pass beneath thelever 6. The weight of the ball 11 is sufficient to overcome theresistance of the spring-\12 and keep the shield in its loW- eredposition, that is with the top of the wick tube projecting above theshield. By providing a kink in the lever as just described, I am enabledto have the pin 3', the kink 5 and the outer end of the lever in thesame straight line, and thereby insure the proper working of the lever.

The wick tube is provided with a plurality of projecting vertical guides14 and the shield 1 has corresponding slots 15 into which the guidespass, whereby the shield is maintained vertical when raised by thelever6.

If the lamp is accidentally or otherwise overthrown or inclined at apredetermined angle, the ball rolls out of its cup, thus allowing thespring to raise the lever and the shield to the position shown by dottedlines and extinguish the lamp.

WVhat I do claim and desire to secure by Letters Patent of the UnitedStates is In a lamp, in combination with a wick tube, of a lever pivotedat one end to the lamp frame and having a kink at its middle part, aspring adapted to raise the lever, a cup upon the other end of thelever, a ball, a circular shield surrounding the wick tube, a pinprojecting from the shield and passing into a hole in the kink of thelever, and projecting vertical guides upon the Wick tube passing intoslots in the shield, substantially as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two witnesses.

ARTHUR GEORGE RICH WILLIAMS.

I/Vitnesses:

E. S. BALDWIN, SYDNEY H. Hrees.

